Pith Number

pith:DAQC3FAT

pith:2015:DAQC3FATWCOKKJJKSFGUWD3H5D

not attested not anchored not stored refs pending

Unlabeled Signed Graph Coloring

Brian Davis

arxiv:1511.07730 v3 · 2015-11-24 · math.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DAQC3FATWCOKKJJKSFGUWD3H5D}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:22:45.010079Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18202d9413b09ca5252a914d4b0f67e8c733df939c4dbb4fcc534867ff867cfa

Aliases

arxiv: 1511.07730 · arxiv_version: 1511.07730v3 · doi: 10.48550/arxiv.1511.07730 · pith_short_12: DAQC3FATWCOK · pith_short_16: DAQC3FATWCOKKJJK · pith_short_8: DAQC3FAT

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/DAQC3FATWCOKKJJKSFGUWD3H5D \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 18202d9413b09ca5252a914d4b0f67e8c733df939c4dbb4fcc534867ff867cfa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22667e6c92d36566f1eb98adc07653b134989f189512a772cd30f770a6b6949c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-11-24T14:35:39Z",
    "title_canon_sha256": "ee2aa30d8dbd74c5e3b4f6687ea569ef18b69744da3272903b8e6fbf2ba6507e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.07730",
    "kind": "arxiv",
    "version": 3
  }
}